Tabulator stop for typewriters



Au 112 19% mmwm O. A. HOKANSON TABULATOR STOP FOR TYPEWRITERS Filed Sept. 22. 1919 2 Sheets-Sheet 1 Aug" 12 9% 1,04%

7 O. A. HOKANSON TABULATOR STOP FOR TYPEWRiTERS Filed Sept. 22. 1919 2 swam-3mm 2 Patented Aug. 12, 192-1.

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OTTO A. HOKANSON, OF WOODSTOCK, ILLINOIS, ASSIGNOR TO THE WOODSTOCK TYPE- WILITER COMPANY, OF WOODSTOCK, ILLINOIS, A CORPORATION OF ILLINOIS.

TABULATOR STOP FOR TYPIEWRITERS.

Application filed September 22, 1919. Serial No. 325,401.

To all whom it may concern:

Be it known that I, OTTO A. HoKANsoN, a citizen of the United States, residing at Woodstock. in the county of McHenry and State of Illinois, have invented certain new and useful Improvements in Tabulator Stops for Typewriters, of which the following is a specification.

This invention has for its object the provision of a device of the character named which shall be of improved construction and operation.

The invention is exemplified in the combination and arrangement of parts shown in the accompanying drawings and described in the following specification, and it is more particularly pointed out in the appended claims.

In the drawings Fig. 1- is a fragmentary vertical sectional view through a portion of a typewriter illustrating one embodiment of the present invention;

2 is an elevation of the parts shown in Fig. 1;

Figs. 3 and 1 are elevations taken at right angles to one another showing a modified form of tabulator stops;

Figs. 5, 6, 7. 8, 10, 11 and 12 all show tabulator stops embodying various modifications;

Fig. 9 is a view at right angles to Fig. 8; and

Fig. 1.3 is a view at right angles to Fig. 12.

Referring more particularly to the draw ings, thenumeral 10 designates a tabulator stop bar which extends transversely of the typewriter frame parallel with the platen roller andis connected with the platen carriage to move therewith. 11 is a stationary way on which the platen carriage moves, and 12 is a bar connected with the carriage to travel along the way 11, there being roller bearings 13 between the relatively movable bars 11 and 12. A stop 14: is supported by the guideway 11 which may be thrown upwardly toward the tabulator stop bar 10 by the tabulator key in any well-known manner. The stop 14 carries a lug 15 for cooperation with tabulator stops on the bar 10, and also carries a beveled guide piece 16 to force the stop downwardly against spring tension so that the tabulator stops may be received between the two parts 15 and 16.

17 is a margin stop carried by the guide bar 11, but forms no part of the present invention.

The tabulator stop bar 10 is provided at both of its vertical sides with grooves 18, as shown in Figs. 1 and 2. These grooves are arranged in pairs, the grooves of each pair being directly opposite one another in order to receive the arms 19 and 20 of a bifurcated tabulator stop 21. The arms 19 and 20 are of a length greater than the vertical thick ness of the bar 10 so that the ends of the arms project below the bar to form stops for engaging the lug 15 on the catch. 14. The lower ends of the arms are beveled, as shown at 22, so that the stop may be readily moved downwardly into place on the bar 10 with the arms 19 and 20 in the vertical grooves 18. The arm 20 is provided with a shoulder 23 which springs into position be neath the lower edge of the bar 10 to retain the stop in place upon the bar. 20 is partially cut away at its upper end leaving a narrow connecting piece 24 to provide the necessary resiliency to permit the arms to be forced over the stop 10 and cause the shoulder 23 to spring into position beneath the lower edge of the bar. The shoulder 23 is not perfectly square, but is rounded on its upper surface so that the stop 21 may be withdrawn from the bar by an upward pull. The upper portion of the stop is pro vided with a finger piece 25 by which it may be handled.

In the form of the invention shown in Figs. 3 and 4 the arms 19 and 20 are connected only by the ring 25 forming the finger piece for handling the stop so that the ring 25 furnishes the necessary resiliency to cause the arms of the stop to bear against the inner faces of the grooves 18 in the bar 10. In this form of the invention the shoulder 23 is omitted and a tongue 26 is struck from the arm 21 so that it projects slightly from the lateral face of the arm into position to engage one of the ribs between the grooves 18. The end of the tongue 26 is beveled on both its upper and lower faces so that it will spring into and out of position as it is moved on to and off of the bar 10.

In the form of the invention shown in Fig. 5 the arms 19 and 20 are both provided with reduced portions 27 to provide the necessary resiliency and both arms have The arm beveled projections 28 in position to engage the lower face of the bar 10 when the stop is in position.

In the form of the invention shown in Fig. 6 only one arm '20 is provided with a beveled projection 28. and the arms are connected'by the finger piece 25 and are otherwise separate to provide the necessary resiliency the same as in Fig. 3.

In Fig. 7 is shown a construction similar to that of Fig. 6, except that both arms 19 and 20 are provided with beveled projections 28.

In the form of the invention shown in Figs. .8 and 9 a separate bar 29 is secured to the lower face of the tabulator stop bar 10 to form projecting ribs to engage corresponding notches cut'in the arms 19 and 20. Each of the arms 19 and 20 is provided with a beveled projection 31 for guiding the arms onto and off of the ribs formed by the edges of the plate 29.

In the form of the invention shown in Fig. 10 the grooves 18 are cut more deeply at their lower ends than they are at their upper ends to form beveled surfaces 32 at the base of the grooves. The arms 19 and 20 of the tabulator stop have their inner edges correspondingly formed to fit the surfaces 32 so that when the stop is in place the spring action of the arms 19 and 20 will tend to prevent its removal. The lower ends of the arms are beveled, as shown at 33, to facilitate placing the stop in position upon the bar 10. In the form of the invention shown in Fig. 11 the grooves 18 of the bar 10 are shaped similar to those in Fig. 10, but the arms 19 and 20 are provided with beveled projections Set to cooperate with the beveled inner faces of the arms in retaining the stop in position on the bar 10.

111 the form of the invention shown in Figs. 12 and 13 the arms 19 and'20 are slit to'form tongues 35 which are offset relative i to the plane of the stop, as shown in broken lines in Fig. 13, so' that the tongues will frictionally'engage the faces of the grooves 18 and retain the stop in'place on the bar 10.

I claim 1 The combination with a stop bar for typewriters having a plurality of transverse grooves thereon, of a bifurcated stop member arranged to straddle said bar with a prong thereon positioned in one of said grooves to hold said stop against longitudi- ."J

-' said prongs extending togard the other prong and arranged to lie beneath a portion of said stop bar when said stop is in position on said bar, the space between the inner portion of said projection and the opposite prong being less than the thickness of the portion of said bar straddled by said prongs so that said prongs must be sprung away from one another to permit movement of said stop into and out of position on said bar the projection having opposite beveled faces to engage said bar and spring said prongs when said stop is moved onto or off of said bar.

2. The combination with a stop bar for typewriters having transverse grooves there in, of a stop adjustably carried by said bar, said stop comprising a yoke having a pair of prongs carried thereby for straddling said bar with a prong in one of the grooves thereon, said yoke having a shoulder for limiting the movement of said stop onto said bar, and a cut-away portion on the side of said shoulder away from said prongs to provide a resilient portion in said yoke for permitting said prongs to be sprung away from one another, and a projection on one of said prongs extending toward the other of said prongs and arranged to underlie said bar when said stop is in position thereon, said projection having opposite beveled portions for springing said prongs away from one another when said stop is moved transversely of said bar into and out of position thereon.

In testimony whereof I have signed my name to this specification on this 19th day of September, A. D. 1919.

OTTO A. HOKANSON. 

